window.onload = () => {
  let itemsDOM = document.getElementById('items');
  let submitBtn = document.getElementById('submit');

  submitBtn.onclick = (e) => {
    let item = document.getElementById('item');
    fetch('http://192.168.152.144:8080/todo',{method: 'POST',body:'item='+item.value})
      .then(res=>{
        res.text().then(txt => 
          console.log(txt)
        );
      });
    };
  fetch('http://192.168.152.144:8080/todo')
    .then(res=>{
      res.text().then(txt => {
        let items = JSON.parse(txt).data;
        itemsDOM.innerHTML = items.map(item => '<li>' + item + '</li>').join('\n');
      });
    });
};
